N-COUNT; N-TITLE
（陆军、海军陆战队、空军）中尉，少尉；（海军）上尉；（美国警察的）警督，小队长
A lieutenant is a person who holds a junior officer's rank in the army, navy, marines, or air force, or in the American police force.
例句
Lieutenant Campbell ordered the man at the wheel to steer for the gunboat.
坎贝尔上尉命令舵手将船开向炮艇。